Will my toddler stop wanting to breastfeed if I get pregnant and my milk turns to colostrum? Tips?

Hey fellow mamas! I am breastfeeding my toddler and wanting to get pregnant with my second little one but am nervous. I only breast feed her for comfort and for naps/bedtime. I’ve read that at around 5 months my milk will change to colostrum and I’m nervous that she will reject the breast and have no comfort to fall asleep and such. I’ll also miss her needing me and that closeness we share because of her still wanting mommy’s boobies lol. Any advice or person experiences?